Both soft and hard ferromangentic particles of different forms with different matrixes can be used as an inclusion in MAE [1]}, [2]}. However, magneto-rheological effect in MAE with soft magnetic particles has larger reversibility at magnetization. The best way to observe an MRE is in matrixes formed with elastomers with the lower value of elastic modules [3]}. The spherical particles of magnetically soft carbonyl iron are most commonly used as a filler in MAE, although MRE can be also observed for nonspherical particles [2]}. The sizes of filler magnetic particles can be different and have bimodal distribution [1]}, [2]}, [7]}.
